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Seeing Is Believing - The Human Eye

written by: pantera182
 
Whether you stare or simply take a quick glimpse, your eyes serve an irreplaceable function. And further more, they are beautiful! Haven't you noticed?

Question 1:


What is the main function of the iris of the eye?
All of these
It controls the amount of light that reaches the retina.
It protects the sclera from injuries.
It protects the lens from injuries.

Question 2:


Where exactly is the retina of the eye positioned?
Along the optic nerve.
Retina is a synonym of pupil.
Right behind the pupil
It's lining the inner surface of the eye.

Question 3:


What part of the eye is usually referred to as 'the white of the eye'?
Sclera
Stroma
All of these
Conjunctiva

Question 4:


The cornea of the eye is the transparent front part that covers the iris, pupil, and anterior chamber. Which of these statements is true about the cornea?
The cornea does not have blood vessels.
All of these
It refract most of the light that enters the eye.
Touch of the cornea provokes an involuntary reflex to close the eyelid.

Question 5:


Why is the pupil of the eye black ?
It contains black pigments.
Most of the light that enters the pupil is absorbed by the tissues inside the eye.
All of these
The tissue right behind the pupil is black.

Question 6:


Conjunctivitis, referred to as "pink eye", is an inflammation of the conjunctiva of the eye. What may be the cause of such inflammation?
All of these
Bacterial infection
Allergic reaction
Viral infection

Question 7:


Which of the following statements is true about the eyelids?
The skin of the eyelids is one of the thinnest skin of the whole human body.
They protect the eye from drying out and from foreign objects.
The skin of the eyelids contains more pigment cells compared to the rest of the skin on the body.
All of these

Question 8:


At what stage of the development of the fetus do eyelashes form?
Between the 13th and 14th week
Around the 20th week
Between the 7th and 8th week
Around the 26th week

Question 9:


Which of these is a medical term that refers to crying?
Lacrimation
Blepharitis
Humoring
Lactation

Question 10:


The average size of a normal human eye is commonly compared to the size of this object.
Cherry tomato
Golf ball
Apricot
Walnut

 


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